Bought a newly released Texenergy Infinite Air 18 Wind Turbine designed by ex UK special forces guy to compliment my
solar as it charges at night as well as day, also bought a Goal Zero Sherpa 100AC to store the power, you can also charge phones or tablets direct from it, there is also a Sherpa 100PD and both deliver and can accept 60w through the PD port, both charge from
solar as well, they charge my iPad Pro 12.9 at 35w
This guy has climbed Everest 10 times, these are superbly designed bits of kits that are used by professionals where power can be an issue.
Mine arrives from Singapore on Thursday via FedEx so can update then.
Field trials using the Goal Zero Sherpa 100AC (the 100AC has an
inverter and comprehensive display showing data), and the 100PD which is a lighter version but same power capabilities, just less ports and no
inverter and basic display but £100 cheaper.
Now available here but beware of import duties, I will know Thursday what these are if any
https://www.texenergy.com/products/ininfinite-air-18-portable-wind-turbine
Hope this may help someone looking for alternative power, although you can charge direct from it, it is useful to store the power in some way.